computersoc Posted December 26, 2016 Share Posted December 26, 2016 I tried the DC port near the shifter and the one in the center arm rest. I tried many different chargers. My phone doesn't charge that fast when using the GPS. I tried it in my truck and in an old Subaru Outback, also while using the GPS, and it works fine. Are the fuses on the ports limiting this? I get maybe 10 percent charge an hour. Phone still shows it's quick charging (Android) but doesn't charge fast at all in this car. Link to comment Share on other sites More sharing options...
resqguy Posted December 26, 2016 Share Posted December 26, 2016 Both ports should be 12-14VDC @ 10A if the engine is running. If you were exceeding the limit of a fuse, then it would blow. Just be aware that pretty much no phones will charge fast when using GPS/NAV, as it is a very intensive process. Not only are you running an app non-stop, plus you're constantly downloading data (unless you have offline maps). And even if you're using auto-brightness, the screen is still on the whole time. Make sure your charger is capable of providing at least 2.1A to get the best possible charge. Link to comment Share on other sites More sharing options...
computersoc Posted December 26, 2016 Author Share Posted December 26, 2016 Yeah, my charger is 3A. It doesn't work fast at all in this car. Same issue with my Ford Fusion Hybrid work car, but the battery percentage actually goes down. As I've said, other cars work fine with the GPS. Link to comment Share on other sites More sharing options...
dgoodhue Posted December 26, 2016 Share Posted December 26, 2016 Mine does not charge very fast at all either ( I have the 2012 premium BT radio, not HK), I would be lucky to get 15% for 45 minutes of driving. I do not normally use the GPS. My phone charges much faster with the wall charger. Link to comment Share on other sites More sharing options...
Zee199969 Posted December 26, 2016 Share Posted December 26, 2016 Have you checked the gauge of the cable? My "Build" Link to comment Share on other sites More sharing options...
computersoc Posted December 26, 2016 Author Share Posted December 26, 2016 Yes. I've tried multiple cords and multiple chargers. They work fine in most other cars but slow in mine. Link to comment Share on other sites More sharing options...
NVAKeith Posted December 26, 2016 Share Posted December 26, 2016 No issue here with either 12v outlet. I use an amazon basics 2.1a charger in my car and it will charge slowly with screen on Waze and quicker using Waze with screen off. AmazonBasics Lightning Car Charger for iPhone, iPad and iPod - Coiled Cable - White https://www.amazon.com/dp/B00Y07GJ5E/ref=cm_sw_r_cp_api_-nlyybFEA4RXT However, when I use the center console USB jack for the factory stereo the phone will discharge while using GPS. Do you have tinted windows? Maybe something about your legacy is restricting your LTE signal, causing more phone battery draw. Link to comment Share on other sites More sharing options...
computersoc Posted December 26, 2016 Author Share Posted December 26, 2016 No tint. Seems to be regular draw. It's not like when I'm on an underground subway. Link to comment Share on other sites More sharing options...
ehsnils Posted December 26, 2016 Share Posted December 26, 2016 Some phones only charges at full current if they can identify the charger as an approved charger. Otherwise they limit the current to avoid damaging the charger. Link to comment Share on other sites More sharing options...
computersoc Posted December 26, 2016 Author Share Posted December 26, 2016 That's not it. As I said, it charges fast in other cars. Link to comment Share on other sites More sharing options...
FLlegacy Posted December 26, 2016 Share Posted December 26, 2016 Its entirely possible the voltage coming out of the legacy power port is lower than the other cars. Have you checked it with a meter? Link to comment Share on other sites More sharing options...
Mrstacy Posted December 26, 2016 Share Posted December 26, 2016 If you have a samsung , try a DC adapter and your household wall charger. Drainso your battery though. Be careful Link to comment Share on other sites More sharing options...
computersoc Posted December 26, 2016 Author Share Posted December 26, 2016 Its entirely possible the voltage coming out of the legacy power port is lower than the other cars. Have you checked it with a meter? No but this is exactly what I'm trying to figure out. Link to comment Share on other sites More sharing options...
compsurge Posted December 26, 2016 Share Posted December 26, 2016 The phone charger has a step-down converter that takes a voltage greater than what is needed to charge the phone and drops it down to 5VDC (9VDC for the Samsung Adaptive Fast Charger). The most likely issue is your charger isn't able to provide the current required to charge your phone. If you paid less than $10 (Amazon price - eBay would be about half) for it and it is a generic, you most likely have 3A peak current with a lower continuous current value. I would not suspect an issue with your vehicle at all. Start with the charger. It is likely the vehicle either has more signal loss (windows, other attenuation issues) than the truck and thus it requires more power draw. If the phone is drawing more current, the chipset on the charger will be heating up more, and it may be limiting the current draw as a result. What phone do you have? Link to comment Share on other sites More sharing options...
FLlegacy Posted December 27, 2016 Share Posted December 27, 2016 Do your other vehicles have bluetooth as well? Sent from my SAMSUNG-SGH-I337 using Tapatalk Link to comment Share on other sites More sharing options...
computersoc Posted December 27, 2016 Author Share Posted December 27, 2016 All vehicles have BT. My truck's is an aftermarket double DIN radio with BT. I'm using quality chargers (Anker etc). Tried three different chargers. LG G4 phone. Same with my Samsung Galaxy S4. Link to comment Share on other sites More sharing options...
FLlegacy Posted December 27, 2016 Share Posted December 27, 2016 I will add my GS4 doesn't always charge consistently, sometimes the fast charge doesn't work with my car charger. I still think it may be a difference in voltage. Subarus are not known for their high power charging systems. Link to comment Share on other sites More sharing options...
computersoc Posted December 28, 2016 Author Share Posted December 28, 2016 Just to note, I tried a portable charger instead of plugging it into the car. Ran Waze and the phone charged fine. It's the car. Link to comment Share on other sites More sharing options...
MGT Posted December 28, 2016 Share Posted December 28, 2016 Just to note, I tried a portable charger instead of plugging it into the car. Ran Waze and the phone charged fine. It's the car. Time for a new car... Link to comment Share on other sites More sharing options...
YeuEmMaiMai Posted December 29, 2016 Share Posted December 29, 2016 I have no issues with a Lumia 950 and a 3amp USB port with a USB 3 cable. I typically do not use my car to charge my phone as I let it charge when I am sleeping Link to comment Share on other sites More sharing options...
brandon.mol Posted December 30, 2016 Share Posted December 30, 2016 Just to note, I tried a portable charger instead of plugging it into the car. Ran Waze and the phone charged fine. It's the car. So let me get this straight. You are taking the same 12v lighter socket USB charger and cable and using it in two cars and it charges your phone faster in one than in the Legacy? A standard USB cable will conduct 1.5 amps, and the USB specification is limited to that. If your car can't provide that without a voltage drop you have serious charging system problems or some really botched wiring in there. Your car does not and cannot "throttle" the current passing through the 12v lighter sockets. Physically impossible. If your car is running at too low a voltage, then your 12v USB adaptor may not properly output 5v at all or at a decent current. That's the only way that the cars charging system could be at fault. You could put an inline amperage meter in the lighter socket fuse and measure the current draw created by your phone. Link to comment Share on other sites More sharing options...
YeuEmMaiMai Posted December 30, 2016 Share Posted December 30, 2016 buy one of these for $6, plug it into USB charger port and then plug your phone into USB port on device. I have one and I verified its accuracy using a regulated power supply that I can control voltage and current draw... https://smile.amazon.com/Display-Tester-Current-Detector-Charger/dp/B015F83X0U/ref=sr_1_9?ie=UTF8&qid=1483078215&sr=8-9&keywords=usb+voltage+meter Link to comment Share on other sites More sharing options...
ehsnils Posted December 30, 2016 Share Posted December 30, 2016 Also check the voltage in the output when the charger is plugged in. But one thing that I have experienced is that some chargers don't reach the bottom of the outlet and therefore remains unconnected causing the device to run on battery. Link to comment Share on other sites More sharing options...
computersoc Posted December 30, 2016 Author Share Posted December 30, 2016 So let me get this straight. You are taking the same 12v lighter socket USB charger and cable and using it in two cars and it charges your phone faster in one than in the Legacy? A standard USB cable will conduct 1.5 amps, and the USB specification is limited to that. If your car can't provide that without a voltage drop you have serious charging system problems or some really botched wiring in there. Your car does not and cannot "throttle" the current passing through the 12v lighter sockets. Physically impossible. If your car is running at too low a voltage, then your 12v USB adaptor may not properly output 5v at all or at a decent current. That's the only way that the cars charging system could be at fault. You could put an inline amperage meter in the lighter socket fuse and measure the current draw created by your phone. I imagine the Legacy is giving around 1.5A even though it should be twice that because of the Quick Charge 3.0 technology (phone supports QC 2.0). My work car, a Ford Focus Hybrid is probably supplying less than 1A. I can watch my phone go down rather than charge. Link to comment Share on other sites More sharing options...
brandon.mol Posted December 30, 2016 Share Posted December 30, 2016 No. The car has no current limiting capability other than a fuse blowing. Only the transformer in the socket-to-usb adaptor has that capability. The car can easily flow 10 amps through that socket. It's up to to the adaptor to draw that much at the voltage available. Link to comment Share on other sites More sharing options...
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